Lubrication of engines.



, A. c. KREBS).I LUBRIGATION OP ENGINES.Y APLIUATION FILED MAB.. 17, 1913.

Patented May 19, 1914 lubricant in tine drops.

' SATES PATENT QFFICE; 'y

ARTHUR CONSTANTIN KREBS, OF PARIS, FRANCE, ASSIGNOR T0 SOCIT ANONYME DES .ANCIENS ETABLISSEMENTS PANHARD 6c LEVASSOR, OF PARIS. FRANCE.

LUBRICATION 0F ENGINES.

Specification of Letters Patent.

Patented May 19, 1914.

Application filed March 17, 1913. Serial No. 7511.973.

diams, a citizen ot the Republic ot France,

and resident of Paris, France, have invcnt ed new and useful Impri'ivenients in the VLnbricaiion of Engines, which are fully set forth in the 'following specification,

This invention relates to a device for the lubrication of engines, which combines the advantages oi splash lubrication with those of a continuous circulation of oil.

In. order to make the following explanations as clear as possible, the accompanying drawings show by way of example the device according to this invention.

Figures l and 2 are vertical sectional views of the improved device, taken at rightangles to cach other; Fig. 3 is a diagrammatic view ol the device applied to a fourcylindcr engine; and Fig. -rlis a diagrammatic view showing a method of regulating the oil sent into the engine.

In splash lubriczition, as generally adopt ed, either the crank or the connecting rod head, in its movement of rotation, touches the surface of the oil which collects at the bottom ot' the crank ease,y and splashes the Orifices or conduits provided .for the purpose collect the oil which trickles down the walls, and convey it between the moving surfaces. The degree 'oi" lubrimition depends therefore on the tpiantity projected, that is to say, on the level oi oil in the crank case.

This invention has 'for its object to maintain the said level as nearly as possible constant by means of a very active oil circulation produced by the splashing i" self. To that end, a groove or pocket A suitably arranged in the wana of the crank case (Figs. 1 and il) and inclined so as to be able to work whatever be the inclination that the' engine may assume in operation, collects a portion of the oil projected against the wall and conveys it into a tank B which forms the accumulator, whence the oil returns to the enginel through a pipeC, the cock D of which enables Ythe supply to be regulated at will. If the level has a tendency to risc in the crank case ol. the engine, the quantity of oil projected. becomes larger and larger, so that the 'pocket will supply more oil to thel tank, and il the admission will have rcmained constant, the level in the crank case has a tendency to become reestablished.

This device can be advantageously applied to crank cases ot' multi-cylinder engines in o'rdcr to maintain a constant quantity of oil in each of the splashing compartments. Fic'. 3 shmvs diagrammatically the circulation of the lubricating oil for an engine with four vertical cylinders. A portion ot the splashing oil collects in the pocket F of an end comimrtmcnt, for instance, the fourth, and is discharged therefrom into the adjoining or third compartment. In the same way, the oi1"passcs from the third compartment t0 the second, and from the latter to the lirst compartment. From the said first comparti ment, the oil is returned to tank G, whence it is again delivered to compartment 4 by gravity, as shown in Fig. 3, through a pipe 1C, the mouth of which opens into that compartment. The flow of oil through this pipe is controlled at will by a cock, (not shown).

By way of carrying out the construction, Fig. 4 shows a scheme for regulating the oil sent into the engine, and in this figure a device is represented for returning the oil by gravity alone. 'lhe oil from the engine, collects in pocket I'I,.and,flows therefrom into a funnel I, the outlet opening of which is gagcd in' order to allord passage to the quantity of oil required for driving slowly. 'lhe excess of oil falls back into the tank. The needle valve J, which may be operated in\any desired manner, (preferably by means of a suitable connection, not shown, with the inlet valve of the engine), permits the additional quantity of oil necessary for perfect lubrication, when the engine is running at full speed, to flow into the return pipe K, and `thence to the engine.

Claims.

1. In a lubricating system for engines, the combination, with the c 'ank case; of an open-topped pocket provided on the wall of said case for etching oil splashed thcreinto from the case; a receiving tank connected to said case, said pocket projecting into said tank and having a discharge opening for delivering the collected oil thcreinto; and a dcpending pipe leading from the bottom of said tank to said case for returning the oil by gravity from the former to the latter, said pipe being provided with means for controlling the passage of the oil therethrough,

Q. In a lubricating system for multi-cylinder engines, the combination of a crank euse provided with an interior, oil-receiving coinpartinent for each cylinder, said compartments being arranged in line; an opentopped pocket provided on the wall of said Icase directly :ibo/e one of said compartments, for catching and collecting oil splashed thereinto from that compartment;

an open-topped oil-catching pocket provided on said Wall above each of the remaining compartments and inclined downwardly toward the next compartment for feeding oil into that compartment; a receiving tank connected to seid case and having` the irstnamed pocket projectingv into it, s'aid pocket v Witnesses:

EMILE LEDRET, LUCIEN MEMMINGER. 

